$color-main:#1164FB;
$color-blue-press: #3272e7;
$color-grey: #E9EAEB;
.main-pd{
  padding: 0 20em 0 20em;
}

/**
 * flex布局
 *  u-f-ac 垂直居中
 *  u-f-ajc 水平垂直居中
 *  u-f-jsb 两端对齐
 */
.u-f,.u-f-ac,.u-f-ajc,.u-f-c,u-f-jsb{
  display: flex;
}
.u-f-ac,.u-f-ajc,u-f-jsb{
  align-items: center;
}
.u-f-ajc{
  justify-content: center;
}
.u-f-jsb{
  justify-content: space-between;
}
.u-f-c{
  flex-direction: column;
}
